To demonstrate how XiaoIce achieves such deep engagement, we provide several examples taken from different sessions of the same user as reported by [1]}.
Figure REF  demonstrates how initial sessions (here Session 1) focus on building rapport and a sense of personal connection. Note that XiaoIce's immediate response to a generic greeting is to “observe” something personal (the user's profile picture) and proactively engage in finding out more about it.
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